How do I find the well log for a property?

Why you want it before you write an offer

The well log is the only independent record of what is actually in the ground. The listing tells you there is a well. The log tells you it is 340 feet deep, cased to 80, and made 12 gallons a minute in 1998 — or that it made three.

It costs nothing and takes about five minutes. On any rural property around Veneta, Elmira, Crow or Noti, it is the first thing I pull.

How to actually search it

The database is organised by township, range and section rather than by address, which throws people. The tool has an address box that converts for you — type the street address, let it fill the TRS, then look at the wells listed in that section.

If you already have the well log ID, that is the direct route. The ID is a four-letter county code plus a number — LANE 51234, for instance. It is assigned when the driller files the report and it is how the state indexes the well for good.

There is also a map interface if the address lookup does not land, and you can filter by owner name, tax lot, completion date, depth or yield.

What the log tells you

Total depth and casing depth. How far down they went, and how far the steel goes. Casing depth matters — it is a large part of what keeps surface water out of your drinking water.

Static water level. Where the water stood in the hole when it was finished. Compared against a neighbouring well drilled twenty years later, this is how you start reading whether an area's water table is moving.

Yield at completion. Gallons per minute the driller measured on the day. This is the number everyone looks at and the one most often misunderstood — see below.

The lithology log. The driller's running note of what they cut through: clay, gravel, blue clay, fractured basalt. This is the part that tells you why the well behaves the way it does.

What the log does not tell you

It is not current. A yield figure from 1998 describes 1998. Wells silt up, pumps age, water tables move, and a neighbour drilling into the same fracture can change what yours does. The log is history, not a condition report.

It says nothing about water quality. Nothing on it addresses arsenic, nitrate or coliform — that is the separate testing obligation Oregon puts on the seller once an offer is accepted.

It says nothing about the pump, pressure tank or plumbing. Those are inspection items and they are frequently the actual expense.

And sometimes there is no log at all. Wells predating the reporting requirement, or drilled without one, simply are not there. On older parcels that absence is common and is not by itself alarming — it just means the flow test and the water test carry all the weight.